Tractor.



Patented Oct'. 9, 1917. 3 SHEETS-SHEET l m o,... Q mm1.. NN.

N. K. wlLcox.

TRACTOR. APPLICATION FILED MAY 25| )916;

T RAcro. APPLICATION FILE-D MAY 25. 9916.

'Patented oen A9, 1917.

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To all whom t mail concern WILCOX, a citizen of the 'United States,.re

siding at Providence, in the countynt Provi-v dence and State of Rhode island, have invented a certain new and useful Improvement in Tractors, of which the following is a full, clear, and exact description; reference being had to the accompanying drawin s.

glhis invention relates to tractors such as are used for agricultural purposes, andthe general object is to provide a simple etlicient tractor adaptable for a great variety of conditions and' suitable not only for agricultural purposes, ybut so constructed that it may be very conveniently operated and thus very 'useful for drawing'heavy loaded vehicles along roadways and streets.

More specific objects are to provide. a tractor which may becaused to maintain its normal upright position on hillsides or uneven ground as well as on level ground; the provision of convenient steering means an the arrangement of wheels whereby the tractor may be turned in a very narrow spacegto so arrange the tractor wheels that the distance between their paths may be Varied to allow for the clearing of intermediate obstructions. v

In carrying out my invention ll provide a suitable frame, narrow in comparison to its length, vmainly supported on two alined wheels one of which is the driving orit'raction wheel and the other steering wheelv preferably also power driven. The frame carries a suitable motor and drivingl niechanism connecting the motor with the traction wheel and with the .steering wheel. To

maintain the' tractor thus supported on,

alined wheels in its normalupright posit-ion I provide extensible axles in lateral or "axial 'alinei'nent with the traction wheel, which are capable of' vertical adjustmentand auto- Amatic yielding movement with relationv to the tractionwheel. These axles are pro- ,vided at their outer ends with wheels which wheels at a tinie.`:Accordingly another object of my invention is the arrangen'ientof kmeans for mounting the ,axle tor theseaout- I Specication of ietters Patent. I- .Patented cg, applicationammira-5,1916. 'Serial naaaraa. i

.standingl wheelsiso` the use of` either may serve to'hold thetractonjm its normal upright position as wellvas 'permitting-the."

automatic adaptation to conditions above 'del scribed. f f

Some of the advantageous results accomplished. by my inventionfare that the longitudinally alined wheels' mayl run in a 'very narrow row or path, permitting the vehicle to pass between rowsv of growing vcrops while either or both of the outstanding wheels may run in Vadjacent parallel rows without coming in lContact with the `interlveningplants; theomission of either stabilizing wheel permitsfthe tractor to be used for pulling cultivating implements close 'to fences, rows of trees, stumps and the .like at.'

`either side of the alined wheelsw'hilel the traction wheel being yin alineme'nt and mounted'in a rigid frame, provides for very" i convenient attachment,"of any implement to be drawn by the tractor, at points providing substantially `a direct pull securing the most' eticieiit` use of the tractorspower, as well -.as allowingthe tractor to be most effectively steered.v The adj'ustability'f the stabilizing wheels and the alinement of the supporting wheels provides great convenience when' the I tractor'is used for plowing,*as'it' permits the longitudinally alined Iwheel'sto run in the open furrow. I

" My invention is hereinafter more fully 'deiris a of the saine; Figs. 3 and `tareconventi,onall plans on a reduced scale illustrating theu'se of the tractor with -af stabilizing wheel omitted either at one side or the otherg-Fig.

5 is a rear elevation -ofthe tractor'illustrating its use on uneven ground; Fig. '6 isaye'r? 100 tical section taken along thefaxis ftheftraci tion wheel illustrating fthe' relative'psition yof the parts when the traction wheel is'atf'a lower level than the outstandingiwheel ,wheels '|Fi'g. '7 is'a detail of'a port-ioni" mechanism connecting the floating-"ax 4, the outstanding -`wheels with "the frame Fi ytion being t'akenon the horizontal-axial n plane; Fig. 9 is a plan .of the-steering mechcarries the'steering mechanism and `means for driving such wheel as will be hereinafter described. At the rea-r of the frame A. the side members -1 and 2 are 'bolted to a transverse plate 6 bracing these members .and providing a platform for the operator,

andwhich isl shown as carrying a suitable v A seat indicated at 8 in Fig'. 1. l

. `Near the'rearportlon'of the frame and between the side members is mounteda trac, tion wheel 10 rotatably 'carried on a large hollow cylindrical transverse bearing 12,the ends of whichare rigidly secured in depending portions llt of bracket members .15 having outwardly .facing grooves or cavities embracing-the side members land 2, and securedv theretoby suitable bolts indicated at 16.V The hub l17 of the tractor wheel ro- -tatably embraces the cylindrical bearing 12 and is secured against lateral displacement by'a ring l8'seating in an annular groove in the outer surface of the drum. This ring ts into a rabbet in the hub 17 of the traction wheel, the wheel being held lin engagement with,` this ringby screws 19 extending .through a sprocket wheel 20, which also rotatably' embraces the axial kdrum and engages the outer side of the ring 18.V This construction is merely illustrative of any suitable means for. rot-ating thiswheel and positioning against lateral displacement.

The steering wheel indicated at 22 is mounted on an axle 23, the ends'of which have bearings in the lower ends of bracket arms .24 -depending from a substantially horizontal plate 25 rotatably engaging the under side ofthe plate 4c and positionedby *a depending flange 26. This steering wheel' is'adapted to have its plane of rotation changed by any suitable steering mechanism vtol be hereinafter. described, but in the nor' mal runningit's'path is substantially in thel -middle of the path of the traction wheel 10.'

Substantially all of the weight of the frame, riving mechanism, etc., of my tractor is supported on the two alined wheels 10 and 22. Accordingly, to maintain the tractor in its normal upright position I provide wheels 30 and 31 each rotatable on the outer end of axle arms 32 and respectively. These axle arms have a telf-:scoping engagement with a .hollow bodily movable Laaaeoo ,opposite sides of enlarged portions 11 and 42, rigidly carried on the ends of the axle l member 35..

"1 Toy so connect the floating axle 35 with the frame of the tractor that the wheels 30 and 31 may serve to stabilize or maintain the upright position of the tractor and vstill permit either or both of the wheels 30 or 31 to run-on a different level of ground from that of the tractor wheel, I have shown rods 45 each having a loop 46 loosely embracing the exterior of the hollowl axle 35, extending upwardly through openings in the outer side l of the cylinder 12 and provided at theirupper ends with plungers, 47, slidably 5e1nbraced by vertically movable cylinder. members 50, carried in vertical -bores provided in upward extensions 52, shown as integral with the brackets 15. The cylinders 50 are provided with openings at their lower ends through which the plunger rods may slide and are closed at their upper ends by `removable' caps 53, and a spring 48 is carried in each of these cylinders 50 having its upper end engaging the cap 53 and its lower end acting downwardly on the yplunger' 17 rl`he position of the cylinders 50 is ordi- 105 narily such that the wheels 30, 10 and 314 may all run on the same level, but it will be seen from Figs. 5 and 6 that these cylinders may be raised or lowered so that the relative level on which either or both of the wheels 30 or 31 may run may be materially (liderent from that ofthe traction wheel, and still these wheels may both serve to maintain the upright position of the tractor.

For convenience in assembling the axle 35, plungers and rods 45, the enlarged portions 41 and 42 are removably secured-to the axle 35 by screws 43,. These permit the vaxle to be removed longitudinally out of .engage-l ment with the loops 46 of the rods 4:5, where-v 120 upon the rods and cylinders may be removed bodily through openings 49 in the lower side'of the hollow axle 12. The cylinders are permitted".v to pass through the brackets 15 by merely removing the caps 53. 125 The axle-s 32' and 33 are each preferablv provided with a longitudinal groove or keyway V51, in the upper side, adapted to be engaged by the -screws 43 by which they are secured l1n any position given them. The in-` 130 assenso ner ends of these grooves terminate short of the inner'ends of the axles providing a shoulder preventing the drawing of the wheel 'too far and entirely removing it from the axle inadvertently, it being necessary to turn the screw 43 upwardly more than the usual distance for adjusting the position of the axle, in order to permit the complete removal of these axles.

scribed operate andthe method of adapting these parts for various conditions is as folA lows: Assuming first that both wheels 30 'and 31 are mounted in position and the cylinders 50 are adjusted so that these wheels and the traction wheel are running substantially on the same level, if the tractor starts to tip in either direction, it immediately encounters the action of the spring 48 acting downwardly `o n'its plunger which through the rjod 45 resists relative upward movement of the corresponding end of the axlemember 35. At the same time the 'wheel on the opvso posite side of the tractor vacts by its weight to pull downwardly on the other end of the axle member 35, which in turn transmits this pull through the adjacent rod 45, plunger 47, to the lower end of the cylinder-member 50 thereby arresting the tipping movement of the tractor.

movement, tends to bring the tractor back to its normal upright position.

Thus we have two elements serving to stabilize the tractor, namely the action of the compression springs and the weight of the wheel at the side of the tractor counteracting thetendency to rise.

A third important element in stabilizing.

the tractor is that if the tractor tips in either direction, say for example toward the ,wheel 30, the entire frame, cylindrical axle 12 'and traction wheel 10 move as a unit,

thus slrnzing the normally vertical plane of the wheellO toward the wheel 30. rlhis in addition to the operations above. described, tends to shift the axle of the wheels 30 and l'longitudinally toward the wheel 30, by reason of the members 36 engaging the guide vet notches in the members 4l and 42v with a result that if the tractor does tip any meutem rial distance, the wheel 30 is necessarily. shifted bodily fromthe path ofthe traction- .wheel. This lateral shifting ofthe wheel. 30.

requires considerable force by reason' of its weight causing great friction on the ground,

The action of one of the. springs 48, compressed by such tipping opposite direction, and theA combined eect -of the three stabilizing 'forces (namely, the

sition, where the forces of these springs are substantially balanced. The manner in which the parts just de` it tips away from the same we haveV the springs andthe weight of. such wheel.

ln order that the outer wheel or 'wheels I may run on a different-level and stillperform their stabilizing functions it 'becomes necessary under many conditions to change the pos1t1on of the'axis of such stabilizing wheels with relation to the axis ,of the Wheel l0 which may bel accomplished by raising or lowering the cylinder members 50, as desired.v For example, if the tractor is beingl used on a hill side or sloping roadway, as illustrated-in Fig. 5, one of the cylinders 50 maybe r ised and the other lowered and held in su h position by any suitable'means, thus bringing one of thestabilizing wheels above the path of the wheel l0 andthe other below it. As a convenient means for raising and lowering the cylinders'O I haveshown a rack 460 on the rear side of each of these cylinders k50 engaged by a pinion 61 adapted to be operated by a ratchet lpawl 62' carried on a pivotedlever 63 which may be vertically oscillated for raising and lowering the cylinders (after the manner of well known lifting jacks) by inserting a suitable movable lever indicated in Fig. 1 at 65.

'lhe stabilizing functions above described I may be performed with 'one .Wheel on a hillside as well as on a level. position shown in Fig. 5, the wheel 31 is not used, the wheel 30will serve to main. tain the stability of the tractor serving by the springs and its friction to prevent the tractor tipping toward the same and Vby Iits weight and the springs to prevent tipping vawayfrom this wheel.

, It khas been previously setl out that the tip ping .of the tractor tends to cause lateralv shifting of the stabilizing wheel whichv shifts only with diliiculty, thereby resisting, 'the tipping. 'l have found that in View off' this ,result of the construction shown, the" Il sired, and, under alarge number of conditions,'the' members 45 connectingthe springs'` springs 48 may be entirely'omitted, if'de? and floating axle may also be omitted.

l/Vhen the tractor is ,used for plowing purposes it is desirable tohave the steering andP Thus, if in the rae cated in broken lines.

traction wheel run in the open furrow with one or both wheels 3() and 31 on the level above the same. I have found in practice that it is preferable to use only one stabilizing wheel, as shown in full lines in Fig. 6, although the other may be used, as indi- When the tractor is used under-these conditions, it is desirable to shift the axis of the stabilizing wheel upwardly which is accomplished by bodily raising the member 35, by raising the cylinders to substantially the same level, by means of the mechanism described.

At 70 is indicated a motor of any suitable construction mounted on cross'members 71 secured to the frame members 1 and 2. This motor is preferably connected with the traction wheel 10 by any suitable driving mechanism, shown as including a chain 72 which runs over the sprocket wheel 19, heretofore described. Such driving mecha- `nism may include change speed gearing, re-

versing`mechanism, braking systems, etc., not shown.

As heretofore stated, the steering wheel is carried in a revolublel bracket engaging the plate L1, andas a means for rotating this bracket in either direct-ion for steering I have shown a worm gear 7 5 provided on an upwardly extending fiange rigid with the plate 25 and shown as engaged by a worm 76 operated by a suitable rod 7 7, adapted to be rotated by a hand wheel 78 adjacent the drivers seat.

In turning sharply, it is frequently necessary to rotate the steering wheel by driving mechanism connected with the engine. Such driving 1mechanism is illustrated in the drawings as including a chain 80 leading from the engine to a short shaft 81 having a suitable sprocket wheel driven by the chain. The inner end of this shaft is provided with a bevel gear 82' meshing with a corresponding bevel gear 84 rigid with a spur gear 85. rl`he gears 8% and 85 are rotatably carried on a suitable stud -rising I from the plate 25. Extending downwardly from this plate is a shaft 86, having a pinion 88 rigid with its -upper end and meshing lwith the gear 85, and at its lower end a bevel pinion 89 meshing with a bevelgear 90 rigid l with the steering wheel 22. It will be noted that regardless of the position of this wheel the driving connection between the engine,

and the steering wheel is provided which.

. may rotate the same in either direction.

The reversing maybe accomplished by suitable clutch mechanism vadjacent the engine, or the steering wheel may be driven in opposite directions by so turning its plane of rotation, that the shaft 86 and gear 9() stand on one side or the other of its direction .of movement.

By the steering arrangement above described, I may turn the tractor in a very Lacasse lclutching its driving mechanism with the engine, may be caused to rotate in either direction, turning the frame about the point on which the traction wheel stands as --a center either to the right or to the left.

F rom the foregoing description it Will'be apparent that I have provided a sii'nple ethcient tractor, which is adapted for a very i wide variety of' conditions, which may be e used in almost every circumstance Where horses are now used, and more effectively owing to its superior power and other obvious advantages. Owing to its convenience in operation, yit is further useful as an element in hauling heavy loads on vehicles drawn behind the same. The construction and operationfof the stabilizing wheels is such that the three axially alined wheels may always be in contact with'the ground regardless of unevenness, and eitheil or both of the stabilizing wheels'may rise over high portions of the ground, while the springs acting on the floating axle will permit the tractor wheel to remain in contact with the ground and rest thereon with` sufcient weight to provide traction at all times. The tractor is equally well adapted for slanting or uneven' country vroads and city pavements as well as uneven or level ground on.

Having thus described my invention,

what I claim is: y

1. In a tractor, the combination of a frame, alined wheels adapted to run in the lio,

same path and acting to support the frame,

a stabilizing wheel positioned at one-side of the tractor, an adjustable extensible mem:

ber on which said wheel isjournaled sub-.

stantially in axial alinement with one ofthe first mentioned wheels.

2. In a tractor, the ycombination of a. frame, a pair of supporting wheels adapted to run substantially in the same path, a removable laterally extending member, a stabilizing wheel journaled on said member,

and means for securing said member to the frame with the wheel at either side of the tract-or, said means permitting its vertical movement with relation to the frame.

3. In a tractor, the combination of a. frame, supporting wheelsadapted to run in substantially the same path, a stabilizing wheel laterally separated from the frame, an

ieeaeee e axle for the stabilizing Wheel, a member connecting the axlewith the frame, means pivi 'ot-ally cooperating with said member permitl tingthe angle of such axle'to changel with relation to the frame and also permitting the vertical movementl of said member with re-` lation to theframegat its pivotal connection. 4. ln a tractor, tlie combination of a ame, driving and steering wheels supporting said frame and arranged to run in the same path, a laterally extending axlel mein'- L ber substantially in axial alineinent with one of said wheels, a stabilizing wheel journa'led on said member at a point separated from the path of the first mentioned wheels,

Vmeans for holding said axle member at either side` of. the frame, and means acting' as the holding means for vertically adjusting the .position of the last mentioned wheel with relation to the path of the others.

- 5. In' a tractor, the combination of a ,frame, wheels snpportingsa'id frame and arranged to run in the same path, one of said vWheels having ahellow bearing member se.

cured to the frame, a laterally positioned stabilizing wheel, an axle therefor extending inside of said'bearing and movablyconframe .and arranged 'to run in the same. path, one of' said wheels having a hollow nected with thelrame.'

' y 6. In 4a tractor, the combination of a frame, a plurality of wheels supporting said bearing member secur dto the traine, a lat ,erally positioned stabi'izing Wheel, an axle therefor extending inside of said bearing,

land means connecting the same with Ythe frame permitting veetieelmovement of said axle member relativeto the frame.'

j. 7. In a tractor, lthe vcombination of a frame, aplurality of wheels supportingsaid frame and. arranged torun in. the same i path, one of said wheels liavingza hollow' bearing; member secured to the frame, a laterally positioned stabilizing wheel, an axle therefor extending inside of said bearing,

member,- and guides slidably engaging said axle at separatedA points permitting a vertical movement while preventing lateral movement. j

A Q8. )lnv a tractor, the combination'. of'v a' frame, a steering wheel and traction Wheel substantially in llongitudinal alineineiit,` a

hollow bearinginember for said traction wheel secured to .the frame, a stabilizing wheel laterallyfpositioned from the frame,

Qa'n axle member ltherefor extending inside said 'hollow :member,` guides permitting a `vertical movement of said axle, and separated yielding kmeans connecting .said axle j lwith the; iframe .and tending to maintain a givenposition o"`, sa i d axle with relation to the frame. o

9. Inga tractor,l the combination of a traine-fa steeriiigwheel and traction wheel substantially inlongitudinal aline'ment, a

hollow bearing memberior said `traction wheel secured to the frame al stabilizing wheel laterally positioned `trom the frame', an axle member therefor extending inside said hollow member,- yieldingmeanseone' necting said axle with the lframe and tending to maintain a given positionof vsaid axle withv relation to the frame,-and means "for f adjusting the normal position of said axle relative to the frame. .j

l0. In' a tractor, the `coi-nbinationf-of` a frame, longitudinally alinedsupporting l wheels therefor. a stabilizing-wheel approximately in axial alinement with oiiefoff the longitudinally lalined wheels-fan extensible means being positioned to hold the axle andai stabilizing wheel with its axis Substantially plane'as the` axis of thev in the same vertical driving wheel,

l2. In a tractor, the combin'ationr'ofalplurality of alined supporting wheels,-a narrow frame connecting the wheels, an. axle meinber extending'transversely of one ofsaid wheels substantially concentric therewith terminating closely7 adjacent `the'sides of the frame and -adapted to be vertically adjusted or tipped in either direction withfrelation to the frame, removable extensions forsa'idl axle member. anda stabilizing wheelalone suiiicient to stabilize the tractor jo.urnaledat the outer end of each of said extensions,- 'f

member extending transversely through one of said wheels substantially concentric: with such wheel. means connecting. said? member with the frame including .yielding-means permitting relative movementl and; having devices whereby the axle l may be ,vertically adjusted or tipped in either directionvwith relation to thefranie, an extension orsa'id axle member, anda stabilizing wheelv vjournaled lat the outer end of said extension. 14. ln a tractor, thev'comb'ina-tion off a `frame, longitudinally alined s'teeringand traction wheels supporting the `frame, al

comparatively large liollowbearingmember for the traction wheel secured to the' frame, a transverse axle member inside Ysaidlliollow member, a lateral extensionforfsaid axle, a

stabilizing wheel journaled on saidfexten sion, means for adjusting the 'relativeposition of the axle and frame', and means/for preventing the relative. lowering movement ,of either endoi' said axle'm'emberwith'relation to the frame vbeyond Ithe predeter-f rioo y j -v@105 ln a tractor, thecombination ofria plu-v iality of alined supporting Wheels,l anl axle mined point, adjustable means for determine ing saidy point.

15. In a tractor, the combination of a frame, longitudinally alined steering and traction wheels supporting the frame, a comparatively large hollow bearing member for the traction wheel secured to the frame, a

" Y transverse axle member inside said hollow .member whereby when the tractor tips in `either direction one of said yielding means, the friction of one of said wheels and the weight of the other may tend to arrest the tipping and cause theframe to resume its j vnormal position.

16. In a tractor frame, the combination of longitudinallv alined traction and steermg .A wheels, independently controllable driving means connected with each of said wheels, a laterally extending axle member 1n axial alinement with the traction wheel, a stabilizing wheel journaled thereon, and means. for

turning the plane of rotation of the steering wheel.

17 In a tractor frame, the combination of.

longitudinally alined traction and steering wheels, means for driving said traction wheel, a laterally extending axle member in vaxial alinement with the traction wheel, a stabilizing wheel journaled thereon, means for turning the plane of rotation of the steering wheel to a position transverse to 'its normal path, and a separately controllable' means for driving'the steering wheel while in any position.

' frame, a. traction wheel journaled near one end thereof and supporting the frame', a

vsteering wheel at the other end of the frame and supporting the same, said steering wheel being adapted to be turned entirelyaround ineither direction, a stabilizing wheel, an

axle therefor movably connected with the,A frame andin substantial alinement with the axis of the traction wheel, means :forv securing the same in position at either side of the frame, means for driving the traction wheel, and independently controllable means for driving the steering wheel.

19. In atractor. the combination of a frame, steering and traction wheels in'longitudmal alinement, a hollow bearing member for said tractionwheel secured tothe frame, anv axle member mounted within said bearmg member, an extension for said axle member and a stabihzmg wheel mounted on 18. The combination of a long narrow naa-2,500

said extension, members embracing th'eaxle A member at separated points, springe cngag` /tra'ction wheel secured to the frame, a stabilizing wheel, an axle journaled thereto and extending toward said hollow bearing member, an axle member adjustably connected with the stabilizing axle mounted within the hollow bearing member, substantiallyvertical guides engaging the end of said axle member and permitting up and down movement while preventing longitudinal displacement, and springs tending to maintain a given position of said axle member with relation to the frame.

21. In a tractor, the combination of a frame, traction'and steering wheels in alinement, a hollow bearing member for said traction wheel secured to the frame, a stabilizing wheel, an axle journaled thereto and extending toward said hollow bearing member, an axle member adjustably connected with the stabilizing axle mounted within the hollow bearing member, substantially vertical guides engaging the end of said axle member and permitting up land down movement while preventing longitudinal displacement, ,springs tending to maintain a given position of said' axle member with relatlon to the frame, plungers c onnecting said springs and axle member, and

vertically adjustable devices for slidably receiving said plungers.

22. In va tractor, the combination of a frame, a steering and traction wheel in alinement, a. comparatively large hollow bearing member for the traction wheel havingl its end secured to the frame and rotatably embraced by said wheel at the intermediate portion, stabilizing wheels adapted to be positioned at each side of the frame, an axle within the hollow bearing member having extensible members journaled to the stabilizing wheels, members embracing the axle member at separated points extending upwardly, plungers on the upper ends of these members, cylinder members embracing .the plnngers and springs acting downwardly on the plungers, and devices operating on each of these cylinder members for raising and lowering the sameto change the position of said axle with relation to the frame.

23. In a tractor, the combination of av frame, longitudinally alined wheels supporting the. frame, a stabilizingwheel, an

axle Jfor the stabilizing wheel connected with a vertically slidable pivotal connection lbetween the ax'le and frame, said connection acting to prevent longitudinal movement of the axle with relation to the frame.

24. In a tractor, the combination ofn a frame, alinecl supporting wheels therefor, a laterally separated stabilizing Wheel, an axle member for the stabilizing wheel mounted transversely of the frame, and means for movably securing the axle to the frame at separated points whilepermitting a change of the angle of the axle relative to the frame, said means including members for preventing longitudinal shifting of said axle member relative to the frame.

25. In a tractor, the combination Aof a comparatively long narrow frame, longitudinally alined wheels supporting the frame, a stabilizing wheel, an axle therefor extending across the plane of the alined wheels and terminating adjacent the sides of the frame, an axle extension on which the stabilizing wheel t is journaled, means for removably connecting said axle tothe frame. -'26. In a tractor, the vcombination of a frame, a driving and steering Wheel supporting the frame, 'independently/controllable driving means connected with each of said wheels, whereby they may bedriven simultaneously or independently, astabilizing wheel, and 'means for connecting said stabilizing wheel with the frame with its axis substantially in the same vertical plane with the axis of said driving wheel.

In testimony whereof, I hereunto aiiix my signature.

NEWTON K. WILCOX. 4 

